package android_serialport_api.sample;

import android.annotation.SuppressLint;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Looper;
import android.widget.Toast;

import com.clouddot.baipai.infrastructure.environment.Env;
import com.clouddot.baipai.ui.activity.AlaunchActivity;

import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Map;

public class CrashHandler implements UncaughtExceptionHandler {
    private UncaughtExceptionHandler mDefaultHandler; // 系统默认的UncaughtException处理类

    private static CrashHandler instance; // CrashHandler实例

    private Context mContext; // 程序的Context对象

    public static final String TAG = "CrashHandler";

    private Map<String, String> infos = new HashMap<String, String>(); // 用来存储设备信息和异常信息

    // 用于格式化日期,作为日志文件名的一部分
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd:HH-mm-ss");

    /**
     * 保证只有一个CrashHandler实例
     */
    private CrashHandler() {
    }

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public synchronized static CrashHandler getInstance() {
        if (instance == null) {
            instance = new CrashHandler();
        }
        return instance;
    }

    /**
     * 初始化
     */
    public void init(Context context) {
        mContext = context;

        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler(); // 获取系统默认的UncaughtException处理器

        Thread.setDefaultUncaughtExceptionHandler(this); // 设置该CrashHandler为程序的默认处理器
    }

    /**
     * 当UncaughtException发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            // 如果用户没有处理则让系统默认的异常处理器来处理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                Env.error(e);
                android.util.Log.e(TAG, "error : ", e);
            }

            Intent intent = new Intent(mContext.getApplicationContext(), AlaunchActivity.class);

            // PendingIntent延时执行Intent
            @SuppressLint("WrongConstant")
            PendingIntent restartIntent = PendingIntent.getActivity(mContext.getApplicationContext(), 0, intent,
                    Intent.FLAG_ACTIVITY_NEW_TASK);
            AlarmManager mgr = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
            mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 200, restartIntent); // 注册延迟定时器,200毫秒后重启应用
            System.exit(1); // (1)非正常退出
        }
    }

    /**
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
     *
     * @param ex
     * @return true:如果处理了该异常信息;否则返回false.
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        // 使用Toast来显示异常信息
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "程序出现异常,即将退出和重启.", Toast.LENGTH_LONG).show();
                Looper.loop();
            }
        }.start();
        // 收集设备参数信息
        collectDeviceInfo(mContext);
        // 保存日志文件
        //  saveCrashInfo2File(ex);
        Env.error(ex);


        return true;
    }

    /**
     * 收集设备参数信息
     *
     * @param ctx
     */
    public void collectDeviceInfo(Context ctx) {
        try {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (NameNotFoundException e) {
            Env.error(e);

            android.util.Log.e(TAG, "an error occured when collect package info", e);
        }
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                android.util.Log.d(TAG, field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                Env.error(e);
                android.util.Log.e(TAG, "an error occured when collect crash info", e);
            }
        }
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return 返回文件名称, 便于将文件传送到服务器
     */
//	private void saveCrashInfo2File(Throwable ex)
//	{
//		StringBuffer sb = new StringBuffer();
//		for (Map.Entry<String, String> entry : infos.entrySet())
//		{
//			String key = entry.getKey();
//			String value = entry.getValue();
//			sb.append(key + "=" + value + "\n");
//		}
//
//		Writer writer = new StringWriter();
//		PrintWriter printWriter = new PrintWriter(writer);
//		ex.printStackTrace(printWriter);
//		Throwable cause = ex.getCause();
//		while (cause != null)
//		{
//			cause.printStackTrace(printWriter);
//			cause = cause.getCause();
//		}
//		printWriter.close();
//		String result = writer.toString();
//		sb.append(result);
//		LogUtil.e(sb.toString());
////		try
////		{
////			long timestamp = System.currentTimeMillis();
////			String time = formatter.format(new Date());
////			String fileName = "crash-" + time + "-" + timestamp + ".LogUtil";
////			if (environment.getExternalStorageState().equals(environment.MEDIA_MOUNTED))
////			{
////				String path = "/sdcard/crash/";
////				File dir = new File(path);
////				if (!dir.exists())
////				{
////					dir.mkdirs();
////				}
////				FileOutputStream fos = new FileOutputStream(path + fileName);
////				fos.write(sb.toString().getBytes());
////				fos.close();
////			}
////			return fileName;
////		} catch (Exception e)
////		{
////			LogUtil.e(TAG, "an error occured while writing fileUtil...", e);
////		}
////		return null;
//	}

}
